<template>
  <div :class="'star star-'+size">
    <span class="star-item" v-for="(sc,index) in starClasses" :class="sc" :key="index"></span>
  </div>
</template>

<script>
export default {
  name: 'Stars',
  props: {
    size: Number,
    score: Number
  },
  computed: {
    starClasses () {
      let { score } = this
      let arr = []
      let scoreInteger = Math.floor(score)
      // 添加整数部分的on
      for (let i = 0; i < scoreInteger; i++) {
        arr.push('on')
      }
      // 添加小数部分的半个星星
      if (score * 10 - scoreInteger * 10 >= 5) {
        arr.push('half')
      }
      // 左后补全的灰色星星
      if (arr.length < 5) {
        arr.push('off')
      }
      return arr
    }
  }
}
</script>

<style lang="stylus" ref="stylesheet/stylus">
  //引入外部的stylus样式
  @import "../../common/stylus/mixins.styl"
  .star //2x图 3x图
    float left
    font-size 0
    .star-item
      display inline-block
      background-repeat no-repeat
    &.star-48
      .star-item
        width 20px
        height 20px
        margin-right 22px
        background-size 20px 20px
        &:last-child
          margin-right: 0
        &.on
          bg-image('./images/star48_on')
        &.half
          bg-image('./images/star48_half')
        &.off
          bg-image('./images/star48_off')
    &.star-36
      .star-item
        width 15px
        height 15px
        margin-right 6px
        background-size 15px 15px
        &:last-child
          margin-right 0
        &.on
          bg-image('./images/star36_on')
        &.half
          bg-image('./images/star36_half')
        &.off
          bg-image('./images/star36_off')
    &.star-24
      .star-item
        width 10px
        height 10px
        margin-right 3px
        background-size 10px 10px
        &:last-child
          margin-right 0
        &.on
          bg-image('./images/star24_on')
        &.half
          bg-image('./images/star24_half')
        &.off
          bg-image('./images/star24_off')
</style>
